Change-speed gearing.



A. B. LANDIS.

CHANGE SPEED GEARING.

APPLICATION FILED AUG. 27, 1909. RENEWED DBO. 9, 1911.

Patented Feb. 20, 1912.

5 SHEETS-SHEET l.

LVVENTOR.

lVlT/VESSES:

A ORNE A. B. LANDIS.

CHANGE SPEED GEARING.

APPLIOATION FILED AUG. 27, 1909. RENEWED 11m. 9, 1911.

1,017,893, Patented Feb. 20, 1912.

5 SHEETS-SHEET Z.

IVITNESSES: -1NVENTOR.

W/EW/ A. B. LANDIS.

CHANGE SPEED GEARING.

APPLICATION FILED AUG. 27, 1909. RENEWED DEC. 9, 1911. 1,017, 93, Patented Feb.20, 1912.

5 SHEETS-SHEET 3.

WITNESSES: 0Q IAVVENTOR. 672% m N W/m v 1 I 7701mm. A

A. B. LANDIS.

CHANGE SPEED GEARING.

APPLIOATION FILED AUG. 27, 1909. RENEWED DBO. 9, 1911.

Patented Feb. 20, 1912.

5 SHEETS-SHEET 4.

IVVENTOR.

' IVITNESSES:

ATTORN- A. B. LANDIS.

CHANGE SPEED GEARING.

APPLICATION FILED AUG. 27, 1909. RENEWED DEC. 9, 1911.

Patented Feb. 20, 1912.

5 SHEETS-SHEET 5.

[1V VENTOR. 14 44, I

AT ANEY.

IVJTNESSES ABRAHAM B. LANDIS, OF WA'YNESIBORO, PENNSYLVANIA.

CHANGE-SPEED GEARING.

Specification of Letters Patent.

Application filed August 27, 1909, Serial No. 514,953. Renewed December 9, 1911. Serial No. 664,762.

To all whom it may concern:

Be it known that I, ABRAHAM B. Lamas, a citizen of the United States, resid ng at Waynesboro, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements 1n Change-Speed Gearing, of which the following is a specification.

My said invention conslsts 1n an 1mproved construction of variable speed frictional driving gearing, embodying amulti- ,7 any jar or undue strain upon the different represent the casin parts and in which the pressure of the fric tional contact between the parts will be automatically regulated by the load, or power required to carry the load, all as Wlll be hereinafter more fully described and claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a top or plan View of a gear casing inclosing a frictional gearlng of my improved construction, Fig. 2 an end elevation thereof, Fig. 3 a central longltudlnal section through the same on the dotted line 33 in Fig. 1, Fig. 4 a similar view showing the parts in a different position, Fig. 5 a cross section on the dotted line 55 in Fig. 3, and Fi 6 a cross section on the dotted line 6-6 1n Fig. 3.

In said drawings the portions marked A or frame, B the outside cylinder incloslng the gearing, and C the inside cylinder.

In many of the details of construction and arrangement the gearing shown is substantially the same as that forming the subject matter of my application No. 399,447,

filed Qctober 28, 1907, the present invention consisting largely in a modification of the construction there shown.

The frame or casing'A is any suitable supporting part for the purpose and adapted to be secured to the machine with which the gearing is to be used. At each end it ls'provided with end ieces or standards A and A, respectively, in which are mounted long sleeves of parts 10 and 11, which serve as bearlngs for long hubs 12 and 13 extending from the outer face'of disks 14 and 15, which are mounted on the shaft-s l6 and 17, respectively. Said parts 10 and 11 are of the form of eccentric disks with long sleeves, the faces of the disks being adjacent and the sleeves being secured in the standards A and A by clamping bolts 6 and dowel pins 6. The shaft 16 is journaled at one end in a bearing formed in the interior of the hub 12 near the disk 14 and at itslother end is journaled in a bearing 18 formed in the part 11 a distance to one side of the'bea-ring therein for sleeve 13 and is adapted to have a longitudinal movement in its bearings. The shaft 17 is journaled at one end in a bearing in the sleeve 13 near the disk 15 and at its opposite end in a bearing formedin the part 10a distance to one side of the bearing therein for the sleeve 12. Said shafts 16 and 17 are thus mounted in their bearings parallel with each other and are arranged one to be the driving and the other the driven shaft. In Flg. 1 I have shown a driving pulley P on the outer end of a shaft 45 coupled to shaft 16 and said shaft will be considered the .driving shaft and 17 the driven shaft in the description of the construction, although it will be understood, of course, that the operation may be reversed and the power applied to shaft 17 and taken from the shaft Patented Feb. 20, 1912.

16. The sleeves of the parts 10 and 11 thus serve as the bearings for the hubs 12 and 13, which serve as the supports forthe shafts 16 and 17, which are connected to rotate therewith and permitted to slide therein by the engagement 1), as shown in Fig. 5, the several parts being arranged as best shown in Fig. 3. The disk 14 with the elongated hub 12, which extends out through the bearing in the part 10, is formed with a shoulder near its inner end and a coiled spring 19 is mounted around the shaft between said shoulder and a collar 20 rigidly secured to the outer end of said shaft beyond the end.

of said hub. Adjacent to disk 14 a series of disks 21 are arranged on shaft 16 and with said disk 14f'are adapted to slide thereon, being secured from rotation by engagement between longitudinal grooves 2) in the shaft (see Fig. 6) and inwardly projecting correspondingly formed lugs o around the aperture in t e disks, as best shown in Fig. 5. Ad'acent to the inner disk 21 a disk 22 is ri i ly mounted on said shaft 16 pref- 'casing, is adapted to engage.

erab y by a screw-threaded connection' A" series of disks 23 are similarly mounted on shaft 17 adjacent to the disk 15 with a dlSk 24 rigidly secured on the shaft ad acent to the inner disk of the series. Shaft 17 1s mounted to slide in its bearings and provided with a spring similar to the spring 19 on shaft 16. The faces of the disks 21 and 23 are formed tapered, the thickness of said disks decreasing from the point of connection with the shaft toward their peripheries.

Eccentric rings 26 and 27 are mounted respectively on the eccentric disks on the inner ends of the parts 10 and 11, said rings being formed with shoulders on their inner faces on which are mounted steel rings 28 and 29 each formed with a groove in its outer face servin as one-half of a ball-race.

The cylinder is formed with recesses at its ends within which are mounted steel rings 30 and 31 formed with grooves on their faces. Said cylinder is mounted with said rings supported on bal1s'32 and 33, mounted in the ball-races between the rings 28 and 30 at one end and 29 and 31 at the opposite end, in the recesses formed in the adjacent faces of said rings 26 and 27. On the outer end of ring 26 is formed an annular flange in the outer surface of which are formed worm-gear teeth with which a worm-gear 35 on a transverse shaft 36, journaled in bearings 37 and 38 on the top of the A. hand wheel 39 is provided on one end of shaft 36 by which it may be turned. The eccentric rings 26 and 27 are rigidlyconnected to rotate together on the eccen-' 10 and 11 and also carrywith it the inner.

cylinder C which-is supported concentrically therewith upon the ball-bearings 32 and 33 in the ball-races on the inner adjacentdicated in'Figrti, and aseries ofannular disks rases gages between t ,e fixed disk 22 and the disk 21 at that end. At the other end the outer disk 41 engages between the disk 15 on the shaft 17 and the adjacent disk 23, while the disk 41 at the other end engages between the fixed disk 24 and the adjacent disk 23. Said disks 40 and 41 are formed with V-shaped rojections at intervals around their peripheries adapted to engage with the V-shaped grooves in the internal face of the cylinder C, so that they are held to revolve with said cylinder while being permitted to slide longitudinally thereof.

The driving pulley P is mounted upon a shaft 45 formed at its inner end with a thimble 46 which fits over the projecting end of shaft 16 around collar 20 on its outer.

edges, which are arranged at-an angle so that as the power is applied to pulley P the edges will operate against the rollers 48 to pull outwardly upon the shaft v16, which through the fixed disk 22 serves to crowd the surfaces of the disks 21 and 40 together so' that the motion of shaft 16 will be transmitted through said disks 21 and the disks 40 and from said disks 40 to the cylinder C, which rotating upon the ball-bearings 32 and 33 carries with it the disks 41. The

I shaft 17 being coupled to the work, in the same manner as shown and described for the coupling of the shaft 16 to the power, it will be seen that the resistance of the work will also tend to draw disk 24 against the inner disk 41 of that series, and bring said disks 41 into frictional engagement with the faces of disks 23 and thus transmit the power to said shaft 17, which is geared to the work. As before stated, and as will be readily understood, the operation may be reversed, if desired, and will be identical regardless of which shaft is used as the driving shaft. 1

It will be noted that the inner edges of the annular disks-40 and 41 have narrow thickened rims 50 which-constitute the bearing The operation is as follows: Referring to Fig. 3, it will be noted that the disks 21 are in engagement with the thickened inner rims of the disks 40 at a point close to the shaft 16, while disks 41 engage with the disks 23 near their peripheries. These'en gagements are always maintained by the action of springs 19, insuring a starting contact at all' times. The driving shaft being started the motion is thus transmitted from shaft 16 to the cylinder C at the slowest speed and greatest power while cylinder C, through the engagement between the disks 41 and 23, serves to transmit the power to shaft 17 with the greatest ossible leverage so that shaft 17 will be riven at a re- -duced speed from that of the shaft 16, but

with great power. In Fig. 4 the cylinder B, with the rings 26 and 27 has been turned by the worm-gear 35 on shaft 36 upon the eccentric bearings on disks of parts 10 and 11 to throw the engagement of the sets of disks to the other extreme points, the disks 21 en-' gaging the rims of disks 40 at their outer edges, while the disks 41 engage the sides of the disks 23 close to the shaft 17.' Thus it will be seen, shaft 16 being the driving shaft,

that shaft 17 will be driven at a speed much greater than the speed of said shaft 16. Any intermediate position in the engagement between the two sets of disks can be effected by the adjustment of cylinder B through the medium of the crank-wheel 39- on shaft 36 and the engagement of the worm-gear 35 with the Worm-teeth on the flange of ring 26, all as will be readily understood.

B this means the speed 'canbe adjusted gra ually and constantly without any sudden change and the strain of the load, or the power, will operate to automatically adjust the pressure of the frictional contact between the several sets of disks, the greater the load the more pressure and as the load lightens the pressure will decrease, so that the strain and wear upon the parts will be no more. than required to carry the work placed upon the gearing. The wearing parts being also-inclosed in the tight casing B are protected from dirt and foreign substance and any interference with their oper- .ation therefrom.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is:

1. In a change speed gearing, the combination of the casing, a driving and a driven shaft journaled in said casing parallel to each other, a plurality of disks on each of said shafts mounted to move longitudinally, a revoluble part surrounding both of said shafts, a plurality of disks carried by said revoluble part a part of which are arranged to engage with the disks on one shaft and a part of which are arranged to engage with tially as set forth.

the disks on the other shaft, and means for ad'usting the point of engagement, substantia ly as set forth. e

2. In a change speed gearing, the combination of the casing, a driving shaft journaledtherein, a driven shaft journaled therein garallel with said driving shaft, a series of isks mounted on the driving shaft to to tate therewith and slide therein, a seriesfof disks mounted on the driven shaft to rotate therewith and slide thereon, a fixed disk-at the inner end of each series of disks on each shaft, means for sliding each of said shafts longitudinally in its bearings, a revoluble part surrounding both of said shafts, a 'series of disks mounted in said revoluble part to" rotate therewith and slide longitudinally, a part of said disks being arranged to engage with the disks on the driving shaft and a part being .arranged to engage with the disks on the driven shaft, substantially as set fcgthi1 d 1 3. c ange spee earing comprisin a casing, a driving shaft? a driven shaft, a series of friction disks on each of said shafts, a

revoluble part surrounding both of said;

shafts, a series of disks carried by said revoluble part, a part of which are arranged to engage with' the disks on the driving shaft and a part of which are arranged to engage with the disks on the substantially as set forth. 4

4. A change speed gearing comprising a casing, a driving shaft mounted to slide longitudinally in bearings therein, a series of disks slidably mounted thereon to rotate therewith, a driven shaft journaled in said casing parallel with said driving shaft,- a

series of disks slidab'ly mounted thereon'to' rotate therewith, an eccentrically mounted revoluble part surrounding both of said shafts and the disks thereon, a series of disks carried by said revoluble part, a part of which are arranged to engage with the disks on the driving shaft and a part of which are arranged to engage with the disks on the driven shaft, and means for turning said eccentrically mounted revoluble part for ad justing the point of frictional contact be tween said several series of disks, substan- 5. A change speed gearing comprising a casing, two parallel shafts journaled in said casing, a series of disks on each of said shafts, an eccentrically mounted revoluble part surrounding said shafts and disks, and a series of disks carried by said eccentrically mounted revoluble part arranged to engage driven shaft,

with each of the series of disks on saidrespective shafts, substantially as set forth.

6. A change speed gearing comprising a casing, two shafts mounted therein parallel with each other, a series of friction disks mounted upon each, an eccentrically mounted cylindrical casing surrounding said shafts,

a cylinder'mounted to rotate within said casin concentric therewith, disks carried by said cylinder arranged to engage with the friction disks on said resgective shafts, and means for adplstmg sa' 'said cylinder, substantially as set forth.

v.7. A change s eed gearing comprisingta casing, parallel s afts journaled in said casing, a series of friction disks mounted on each shaft, a rotary cylinder surrounding said shafts and mounted on eccentric bear.-

ings, said eccentric bearings, a series of disks carried by said cylinder a part of which are arranged to engage with the friction disks on one shaft and a part of which are arranged to engagewith the series of disks on the other shaft, substantially as set forthi 8. A change speed gearing comprising a casing, parallel shafts mounted to slide longitudlnally in hearings in said casing, a series of sliding disks mounted on each of said shafts to rotate therewith, a fixed disk at the inner end of each series, means for sliding said shafts longitudinally, a rotary cylinder eccentrioally mounted surrounding said shafts and disks, a series of disks carriedby' said rotary cylinder and mounted to slide longitudinally therein, a part of which are adapted to engage between the series of disks on one shaft and a part of saidshafts, substantially as set forth.

10; A change speed gearing comprising a casing, parallel shafts mounted therein, a

series of longitudinally movable friction disks mounted on each of said shafts, a rotary part surrounding said'shafts, a'series of ..longitudinal1y movable disks carried by said rotary part, a part of which are adapted to engage with the disks of one shaft and a part of which are adapted to engage with casing carrying Ha es:

sliding said shafts longitudinally for securing the frictional driving contact, substantially as set forth. I

11. A change s eed gearing comprising a casing, parallel s afts mounted in bearin ;in said casing, a series of slidable dis mounted on each shaft, a revoluble part surrounding said. shafts, a series of slidable ,disks carried by said revol'uble part, part of said disks being arranged? to engage between tthe disks in one shaft and part between the disks on another, and means for sliding said ,several disks to create a frictional driving fsontlact between them, substantially as set ort s 12. A change speed gearing comprising a @casing, parallel shafts mounted in bearings ;in said casing, a' series of slidable disks mounted on each shaft, a revoluble part surrounding said shafts, a series oflslidable gdisks carried by said revoluble part, arts of said disks being arranged t'o' engage Eetween vthe disks on one shaft andvpart between the disks on another, and means for creating lfrictional driving contact between said disks by the power transmitted, substantially as set fort 13. A change speed gearing comprising two parallelshafts each having a series of disks slidably'fnounted thereon, ring disks surrounding said shafts and engaging said disks and means for holding said disks in frictional driving contact by the power transmitted, substantially as set forth.

i l hA changespeed gearing comprisingtWo parallel shafts each having a series of disks slidably mounted thereon, ring disks surrounding said shafts and engaging said idisks, means for normally holding said disks contact, and means for giving pressure to said disk for frictional driving contact by the power transmitted, substantially as set forth. In witness whereof, I, have hereunto set iny hand and seal at Waynesboro, Pennsylyania this 25th day of August, A. nine- 

